A. Ignesti
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View article: Resurging from the ashes: A spectral study of seven candidate revived radio fossils in nearby low-mass galaxy clusters
Resurging from the ashes: A spectral study of seven candidate revived radio fossils in nearby low-mass galaxy clusters Open
Complex energy transfer processes in the intracluster medium (ICM) can revive fossil (with spectral ages $\gg100$ Myr) plasma initially generated by radio galaxies. This leads to the re-ignition of faint radio sources with irregular and fi…
View article: The interplay between active galactic nuclei and ram pressure stripping: spatially resolved gas-phase abundances of stripped and undisturbed galaxies
The interplay between active galactic nuclei and ram pressure stripping: spatially resolved gas-phase abundances of stripped and undisturbed galaxies Open
Context. It has been reported that the gas-phase oxygen abundance of the circumnuclear regions around supermassive black holes (SMBHs) could be affected by the presence of an active galactic nucleus (AGN). However, there is currently no ag…
View article: Star formation at different stages of ram-pressure stripping as observed through far-ultraviolet imaging of 13 GASP galaxies
Star formation at different stages of ram-pressure stripping as observed through far-ultraviolet imaging of 13 GASP galaxies Open
Galaxies undergoing ram-pressure stripping develop gaseous tails that can extend several kiloparsecs outside the galaxy disc. Under favourable conditions, star formation can occur in the stripped tail, but there are cases where it does not…
View article: The MUSE view of ram pressure stripped galaxies in clusters: The GASP sample
The MUSE view of ram pressure stripped galaxies in clusters: The GASP sample Open
We present the full sample of 76 galaxies in 39 galaxy cluster fields at z = 0.04 to 0.07 observed with VLT/MUSE by the GAs Stripping Phenomena in galaxies (GASP) survey. Most of them (64) were observed as possible ram pressure stripped ga…
View article: The phase-space of tailed radio galaxies in massive clusters
The phase-space of tailed radio galaxies in massive clusters Open
The radio jets of radio galaxies in galaxy clusters are often bent due to the ram pressure of the intracluster medium. Most studies of bent radio tails initially identified tailed sources and then attempted to characterise their environmen…
View article: Investigating the Intracluster Medium Viscosity Using the Tails of GASP Jellyfish Galaxies
Investigating the Intracluster Medium Viscosity Using the Tails of GASP Jellyfish Galaxies Open
The microphysics of the intracluster medium (ICM) in galaxy clusters is still poorly understood. Observational evidence suggests that the effective viscosity is suppressed by plasma instabilities that reduce the mean free path of particles…
View article: Investigating the intracluster medium viscosity using the tails of GASP jellyfish galaxies
Investigating the intracluster medium viscosity using the tails of GASP jellyfish galaxies Open
The microphysics of the intracluster medium (ICM) in galaxy clusters is still poorly understood. Observational evidence suggests that the effective viscosity is suppressed by plasma instabilities that reduce the mean free path of particles…
View article: Spatially Resolved Comparison of SFRs from UV and Hα in GASP Gas-stripped Galaxies
Spatially Resolved Comparison of SFRs from UV and Hα in GASP Gas-stripped Galaxies Open
Star formation rates (SFRs) in galaxies offer a view of various physical processes across them, and are measured using various tracers, such as H α and ultraviolet (UV). Different physical mechanisms can affect H α and UV emission, resulti…
View article: Ageing and dynamics of the tailed radio galaxies in Abell 2142
Ageing and dynamics of the tailed radio galaxies in Abell 2142 Open
Context. Tailed radio galaxies are shaped by ram pressure that is due to the high-velocity motion of their host through the intracluster medium (ICM). Recent works have reported on the increasing complexity of the phenomenology of tailed g…
View article: Ageing and dynamics of the tailed radio galaxies in Abell 2142
Ageing and dynamics of the tailed radio galaxies in Abell 2142 Open
Context. Tailed radio galaxies are shaped by ram pressure owing to the high-velocity motion of their host through the intracluster medium (ICM). Recent works have reported on the increasing complexity of the phenomenology of tailed galaxie…
View article: Spatially resolved comparison of SFRs from UV and H$α$ in GASP gas-stripped galaxies
Spatially resolved comparison of SFRs from UV and H$α$ in GASP gas-stripped galaxies Open
Star-formation rates (SFR) in galaxies offer a view of various physical processes across them and are measured using various tracers, such as H$α$ and UV. Different physical mechanisms can affect H$α$ and UV emission, resulting in a discre…
View article: A 100 kpc ram pressure tail trailing the group galaxy NGC 2276
A 100 kpc ram pressure tail trailing the group galaxy NGC 2276 Open
We present the discovery of a 100 kpc low-frequency radio tail behind the nearby group galaxy, NGC 2276. The extent of this tail is a factor of ten larger than previously reported from higher-frequency radio and X-ray imaging. The radio mo…
View article: A 100 kpc Ram Pressure Tail Trailing the Group Galaxy NGC 2276
A 100 kpc Ram Pressure Tail Trailing the Group Galaxy NGC 2276 Open
We present the discovery of a 100 kpc low-frequency radio tail behind the nearby group galaxy, NGC 2276. The extent of this tail is a factor of ten larger than previously reported from higher-frequency radio and X-ray imaging. The radio mo…
View article: A JVLA, LOFAR, e-Merlin, VLBA, and EVN study of RBS 797: can binary supermassive black holes explain the outburst history of the central radio galaxy?
A JVLA, LOFAR, e-Merlin, VLBA, and EVN study of RBS 797: can binary supermassive black holes explain the outburst history of the central radio galaxy? Open
Aims. The multifaceted central radio galaxy of the cluster RBS 797 shows several episodes of jet activity in multiple directions. We wish to understand the causes behind these dramatic misalignments and measure the timescales of the succes…
View article: A JVLA, LOFAR, e-Merlin, VLBA and EVN study of RBS 797: can binary SMBHs explain the outburst history of the central radio galaxy?
A JVLA, LOFAR, e-Merlin, VLBA and EVN study of RBS 797: can binary SMBHs explain the outburst history of the central radio galaxy? Open
We present a multi-frequency (144 MHz - 9 GHz) and multi-scale (5 pc - 50 kpc) investigation of the central radio galaxy in RBS 797, by means of JVLA, LOFAR (with international stations), e-Merlin, VLBA and EVN data. We investigate the mor…
View article: LOFAR detection of extended emission around a mini halo in the galaxy cluster Abell 1413
LOFAR detection of extended emission around a mini halo in the galaxy cluster Abell 1413 Open
Context. The relation between giant radio halos and mini halos in galaxy clusters is not understood. The former are usually associated with merging clusters, while the latter are found in relaxed systems. In recent years, the advent of low…
View article: ViCTORIA project: The LOFAR view of environmental effects in Virgo cluster star-forming galaxies
ViCTORIA project: The LOFAR view of environmental effects in Virgo cluster star-forming galaxies Open
Context. Environmental effects such as ram pressure stripping (RPS) shape the evolution of galaxies in dense regions. Aims. We used the nearby Virgo cluster as a laboratory to study the environmental effects on the nonthermal components of…
View article: Nearby galaxies in the LOFAR Two-metre Sky Survey
Nearby galaxies in the LOFAR Two-metre Sky Survey Open
Context. To understand galaxy evolution, it is essential to measure star formation rates (SFRs) across cosmic time. Aims. The use of radio continuum emission as an extinction-free tracer of star formation necessitates a good understanding …
View article: A combined LOFAR and <i>XMM-Newton</i> analysis of the disturbed cluster PSZ2G113.91-37.01
A combined LOFAR and <i>XMM-Newton</i> analysis of the disturbed cluster PSZ2G113.91-37.01 Open
In this work, we investigate the interplay between the X-ray and radio emission of the cluster PSZ2G113.91-37.01 ( z = 0.371) using the high-quality XMM-Newton observations of the Cluster HEritage project with XMM-Newton – Mass Assembly an…
View article: Radio-continuum spectra of ram-pressure-stripped galaxies in the Coma Cluster
Radio-continuum spectra of ram-pressure-stripped galaxies in the Coma Cluster Open
Context . The population of galaxies in the local Universe is bi-modal in terms of the specific star formation rate. This fact has led to a broad distinction between star-forming galaxies (typically cold-gas-rich and late-type) and quenche…
View article: ViCTORIA project: The LOFAR-view of environmental effects in Virgo Cluster star-forming galaxies
ViCTORIA project: The LOFAR-view of environmental effects in Virgo Cluster star-forming galaxies Open
Environmental effects such as ram-pressure stripping (RPS) shape the evolution of galaxies in dense regions. We use the nearby Virgo cluster as a laboratory to study environmental effects on the non-thermal components of star-forming galax…
View article: Radio-continuum spectra of ram pressure stripped galaxies in the Coma Cluster
Radio-continuum spectra of ram pressure stripped galaxies in the Coma Cluster Open
$Aims:$ We used the nearby Coma Cluster as a laboratory in order to probe the impact of ram pressure on star formation as well as to constrain the characteristic timescales and velocities for the stripping of the non-thermal ISM. $Methods:…
View article: Ram-pressure stripped radio tail and two ULXs in the spiral galaxy HCG 97b
Ram-pressure stripped radio tail and two ULXs in the spiral galaxy HCG 97b Open
We report LOFAR and Very Large Array (VLA) detections of extended radio emission in the spiral galaxy HCG 97b, hosted by an X-ray bright galaxy group. The extended radio emission detected at 144 MHz, 1.4 GHz, and 4.86 GHz is elongated alon…
View article: Shock imprints on the radio mini halo in RBS 797
Shock imprints on the radio mini halo in RBS 797 Open
Aims. In this work, we analysed new LOw Frequency ARray observations of the mini halo in the cluster RBS 797, together with archival Very Large Array observations and the recent Chandra results. This cluster is known to host a powerful act…
View article: Shock imprints on the radio mini halo in RBS797
Shock imprints on the radio mini halo in RBS797 Open
In this work, we analysed new LOw Frequency ARray observations of the mini halo in the cluster RBS797, together with archival Very Large Array observations and the recent Chandra results. This cluster is known to host a powerful active gal…
View article: A combined LOFAR and XMM-Newton analysis of the disturbed cluster PSZ2G113.91-37.01
A combined LOFAR and XMM-Newton analysis of the disturbed cluster PSZ2G113.91-37.01 Open
In this work, we investigated the interplay between the X-ray and radio emission of the cluster PSZ2G113.91-37.01 (z = 0.371) using the high-quality XMM-Newton observations of the CHEX-MATE project, and the images of the LoTSS-DR2. The clu…
View article: The effect of cluster dynamical state on ram-pressure stripping
The effect of cluster dynamical state on ram-pressure stripping Open
Theoretical and observational studies have suggested that ram-pressure stripping (RPS) by the intracluster medium can be enhanced during cluster interactions, boosting the formation of the ‘jellyfish’ galaxies. In this work, we study the i…
View article: On the Encounter between the GASP Galaxy JO36 and the Radio Plume of GIN 049
On the Encounter between the GASP Galaxy JO36 and the Radio Plume of GIN 049 Open
We report the serendipitous discovery of an unprecedented interaction between the radio lobe of a radio galaxy and a spiral galaxy. The discovery was made thanks to LOFAR observations at 144 MHz of the galaxy cluster A160 ( z = 0.04317) pr…
View article: On the encounter between the GASP galaxy JO36 and the radio plume of GIN 049
On the encounter between the GASP galaxy JO36 and the radio plume of GIN 049 Open
We report on the serendipitous discovery of an unprecedented interaction between the radio lobe of a radio galaxy and a spiral galaxy. The discovery was made thanks to LOFAR observations at 144 MHz of the galaxy cluster Abell 160 ($z=0.043…
View article: Ram Pressure Stripping in the EAGLE Simulation
Ram Pressure Stripping in the EAGLE Simulation Open
Ram pressure stripping of satellite galaxies is thought to be a ubiquitous process in galaxy clusters, and a growing number of observations reveal satellites at different stages of stripping. However, in order to determine the fate of any …